Flush switch.



No. 857,177. PATENTED JUNE 18, 1907.

H. HUBBELL. FLUSH SWITCH.

APPLICATION FILED NOV. 18. 1906.

2 SHEETS-SHEET l.

W/ TNE SSE S 7fvwwew I M/VENTQI? No. 857,177. PATTENTED JUNE 18, 1907 H. HUBBELL. PLUSH SWITCH.

APPLICATION PILEDNOV.16.1908.

2 SHEETS-SHEET 2.

WITNESSES INVENTOH 765% 04 M M %a1 zip/@29 WM;

21 TTOHNE r risrrnn srasgs s Specification of Letters Patent.

Application med November is, 1906. serial No. 343,705.

i To all whom it may concern? Be it known that I, HARVEY HUBBELL, a citizen of the United States, residing at Bridgeport, county of Fairiield, State of Connecticut, have invented a new and useful Flush Switch, of which the following is a specification.

This invention relates to double-pole electrical switches of the type known as flush switches; that is, switches operated by means of push buttons which extend through openings in the face plate, and the invention has for its objectto rovide a switch of this character which shal besiinple and inexpensive to produce, easy to operate, certain in use and durable, the push buttons having but a short raise, the contacts being large and of the knife-blade type and being under positive control, no springs being necessary ut a spring being preferably used to acceler ate the movement after the rocker arm has assed the center of oscillation.

Withthese and other objects in View I have devised the simple and novel flush switch, of which the following description in connection with the accompanying drawings is a specification, reference characters being used to indicate the several parts:

Figure I is a face view of my novel switch as in use; Fig. 2 a rear view corresponding therewith; Fig. 3a section on the line 33 in- Fig. 1, looking in the direction of the arrows, the switch being in the closed position; Fig. 4 a section on the line" 4% in Fig. 2, looking in the direction of the arrows, the switch being in the open osition; Fig. 5 a detail sectional view on tile line 5-5 in Fig. 3, looking in the direction of the arrows;

Fig. 6 a detail sectional view on an enlarged scale, on the line 6-6 in Fig. 5, looking in the direction of the arrows; and Fig. 7 is a detail elevation illustrating a slightlyvariant form of construction.

10 denotes the case which may be made of porcelain, or other suitable material, in a single piece,and 11 the face plate which is secured thereto in any ordinary or preferred manner.

- 1,2, 13, 14 and 15 denote standards having at their inner ends angle plates 16 which are secured to the bottom of the case by means =01? screws 17 At the upper ends of the standards are binding screws 18. The -four wires, not shown, enter the case though holes 19 in the bottom and are connected to the binding screws. The hired contacts, n1

has been past-i the present instance pairs of contact plates indicated by 20, are carried by standards 13 and 15. These contacts are engaged by movable contacts, in the resent instance blades 21, upon arms 22 w ich are pivoted to lugs 23 formed upon standards 12,.and 14, said contact blades and contact plates conirising what are known in the trade as knife lade' contacts.

24 denotes a rocker arrn pivoted to a standard 25, risirn from one of the angle plates 16 which is secured to the bottom'of the case by one of the screws 17.

26 denotes push buttons which extend through holes 27 in the face plate and are secured to arms 28 which are pivoted to the rocker arm on opposite sides of, the pivotal point of said arm to standard 25.

The rocker arm is connected by means an arm 29 to a shaft 86 which extends tween arms 22, said 21111922 being pivoted to said shaft at approximately their length. For convenience in assembling,

shaft 30 is made in two parts which are indicated respectively by 31 and 32. The inner end oi part 31 is provided with a reduced hub 33, the end of which passes into a socket 34.

in part 82. The outer ends of both. parts are provided with hubs 35 upon which arms 22 are pivoted. As it is necessary that shaft 38.

should be insulated. from arms 22 which carry the current, I rovide between said arms and hubs 35 insulating washersfa o, and between said arms and the main portions of parts 31 and 32 respect? rely and outer washers 3'? I provide insulating washers 38.

39 denotes an eye at the lower end of arm 29 through which hub 38 passes. 410 denotes another eye through which hub 33 passes and which has extending therefrom a pin 41 which passes through a guide .2 on stand d 25. A s ring 43 surrounding the pin against s aft 30. In the present instance the sprin bears against eye 4-3 which oscih ably,'however, use the spring as it normally acts to retain the inovahieccntacts in either the open or closed position, to which there no objection, and soon as the rocker arc: filliijJOSii-EOR, or cenreg 'tacts or blades 21.

ter of oscillation, in either opening or closing the switch, the full power of the spring acts to throw the movable contacts instantly to either the open or closed position as may be.

47 denotes a stop on pin 41 which engages guide 42 and limits the upward movement of arms 22 in opening the switch.

1t will of course be obvious that the details of construction may be greatly varied without departing from the principle of the in vention. For example, in Fig. 7 I haveillustrated. a variant form in which a single arm 44, to which a, push button is attached and which is loosely pivoted to the rocker arm, takes the place of arms 28 and 29 in the other form. in. the modified form, the rocker arm is shown as provided with a slot 45 which is engaged by a pin 46 extending from arm 44.

The operation is as follows: Supposing the switch to be in the open position, as in Fig. 4, it is moved to the closed position by pressing upon the high push button, the effect of which is to oscillate the rocker arm and swing arms 22 downward placing the contact blades in engagement with the contact plates, as in Fig. 3, the closing movement being accelerated by the action of the spring after the rocker arm has passed the mid-position' As either push button is pressed downward, the other push button is correspondingly raised, the construction of the present switch being such as to permit easy operation of the switch with but relatively small movement, 6. 0. rise and fall, of the push buttons. If the switch is in the closed position, it may be opened by pressing upon the high push button, which is of course the mate to the one operated to close the switch and which was raised when the switch was moved to the closed position.

' It will be understood that the motion imparted by means of the push buttons 26 is considerably multiplied at the movable con- This is because the rocker 2d and the switch arms 22 are not mounted on one shaft or pivot, but have separate or independent pivots which are parallel and the link or arm 29, has its'connection with said arms 22 at a point between the pivots of said arms and theouter ends thereof which carry the contacts 21. Preferably, as shown in Fig. 4, the point where the link 29 is pivoted to the rocker 24 is at a greater distance from the pivot of said arm 24 than the pivotal points of the push button arms 28vwithsaid rocker. Since the pivotal point of the link 29 wii h the switch arms is substantially midway of the length of said arms, the movement of the contacts 21 will be at least double the movement of the push buttons Therefore the movements of the movable contacts will be very quick, well as pnsitive, in opening or closing.

Having thus described my invention I claim:

1. Aswitch of the character described comprising pivoted rocker and switch arms the pivots thereof being parallel and independent, a link connecting the -rockerwith the switch arms, push buttons connected with the rocker at opposite sides of its pivot, and fixed contacts to cooperate with the switch arms, the connection between the movable parts being adapted to positively actuate the rocker and switch arms in both directions.

2. A switch of the character described comprising a pivoted rocker and pivoted switch arms the pivots thereof being parallel and independent, a linkconnecting the rocker'with the switch arms, push buttons connected with the rocker at opposite sides of its pivot and at lesser distances from its .pivot than. the connection of the link with. the rocker, and fixed contacts to cooperate with the switch arms.

3. A switch of the character described comprising a pivoted rocker, and two pivoted switch arms, a shaft connecting said switch arms to swing in unison, said shaft being lo'' cated between the pivots and the ends of.

said arms, a'link connecting the rocker with said shaft, push buttons connected with the rocker at opposite sides of its pivot, and fixed contacts to cooperate with the switch arrhs. 4. A switch of the character described comprising fixed and movable contacts, pivoted arms by which the movablecontacts are carried, a two-part shaft each part having at its outer end a hub 35 on which one of the arms is pivoted, insulation between said hubs and said arms, one of said shaft parts being provided on its inner end with a hub 33 and the other part with a socket to receive it, a rocker arm, an arm pivoted to the rocker arm and having an eye through which hub 33 passes, and means for oscillating'the rocker arm to open and close the switch.

comprising fixed and movable contacts, pivoted arms by which the movable contacts are carried, a shaft to which said arms are connected, a rocker arm, an arm connecting the rocker arm and the shaft, a pin extending .l'rom said shaft, a guide through which the pin passes and a spring between the guide and the shaft A switch of the character described comprising fixed and movable contacts, pivoted arms by which the movable contacts are carried, a two-part shaft to whose outer ends said arms are connected, a hub on the inner end of one'ol said shaft parts and a socket in the other part to receive it, a rockerarm, an

arm pivoted to the rocker arm and having an eye through which said hub passes, a pin also having an eye through which said hub passes, a guide through which the pin passes and a spring bearing on the guide and the eye of the pin, substantially as described, for the purpose specified.

0. A switch of the character described IIO 7. A switch of the character described comprising four standards provided with binding screws, contact plates on tWO OfjS8lid. standards, arms pivoted to the other standards and carrying contact blades adapted to engage thecontact plates, a shaft connecting standards, arms pivoted to the other standards and carrying contact blades adapted to engage the contact plates, a shaft connecting said arms, a rocker, arm, a standard on which the rocker arm is pivoted and which is provided with a guide, an arm connecting the rocker arm and the shaft, a pin extending from the shaft and passing through the guide and a spring bearing against the guide and the shaft, substantially as described, for the purpose specified.

9. switch of the character described comprising fixed contacts, contact carrying arms, a shaft'on which. said arms are pivoted,

a rocker arm, connections intermediate the rocker arm and the shaft, a pin extending from said shaft, a guide through which the pin passes, a spring acting to accelerate the movement in openingand closing the switch when the rocker arm has passed the midposition, and a stop on the pin which engages the guide to limit the upward movement of the arms in opening the switc In testimony whereof I afiix my signature, in presence of two Witnesses Witnesses:

A." M. WoosTER, LILLIE' E. DISBROW.

HARVEY HUBBELL. 

